/*
 * Copyright (c) 2024 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

// Base class Animal
class Animal {
    public makeSound(): void {
        console.log('The animal makes a sound.');
    }
}

// Subclass Dog
class Dog extends Animal {
    public makeSound(): void {
        console.log('The dog barks.');
    }
}

// Subclass Cat
class Cat extends Animal {
    public makeSound(): void {
        console.log('The cat meows.');
    }
}

// Test the polymorphism
const dog = new Dog();
dog.makeSound(); // Calls Dog's makeSound method

const cat = new Cat();
cat.makeSound(); // Calls Cat's makeSound method